ngn999

(defun squar (x)
  "return x * x"
  (* x x))

;; scroll-ahead
;; scroll-behind


;;switch-to-buffer
;;other-buffer

ngn999

 p = reinterpret_cast<const unsigned char *>(szKey);
        while (*p) {
            res = (res << 7) + (res >> 25) + *p++;
        }

// 相当于,res这个int32将前面8位移到后面去了, eg.   1101001xxxxxxxxxxxxx,就成了,xxxxxxxxxxxxx110100  

ngn999

`(a list have (+ 2 3) elements)  => (a list have (+ 2 3) elements)
'(a list have (+ 2 3) elements)  =>  (a list have (+ 2 3) elements)

`(a list have ,(+ 2 3) elements) => (a list have 5 elements)